A vital component of the network is DNS servers. The relation between the addresses of the internet protocol and the domain name system is given. Traffic from various sources is provided from DNS servers. Due to this, the privacy areas are not secure. DNS servers are often ISPs that can use the data they receive from users in any way. Such businesses are not always close control by the regulatory authorities and the consumer data can also be misused for marketing purposes. A DNS leak triggers a user leak when an person uses a VPN. Multiple forms of leaks occur. Let us look at the common causes and how these leaks can be repaired.
1. Poorly configured network
The number one reason for DNS leaks is incorrect network configuration. It usually occurs at various ways when you use several networks. If you use the link, the DHCP configuration is the same. If you have not modified the settings to make sure that your devices do not delegate unsafe DNS servers automatically, you will have a DNS leak even though you use a VPN. To fix it, you have to add your automatic gateway to the DNS provided by your VPN. If this is not feasible, it is necessary to manually configure an automated DNS server.
2. IPv6 to IPv4 conversion
Since several years now, the Internet has dominated the IPv4 address format. This address form has a 32-bit code that defines a machine’s IP. Nonetheless, it is obsolete with IPv4 technology. The older IPv6 technology is slowly losing favor. Sadly, after an IPv4 request has been sent over an IPv6 tunnel, VPN users are not shielded from DNS leaks. As noted by GoBestVPN, most VPN servers use the old technology and information is leaked accidentally unless the VPN has new tunnels. This question has a simple fix: finding an IPv6 compatible VPN service. It means you won’t be exposed to third parties in your flow.
3. Windows features
The operating system is another cause of DNS leaks. Windows has a special feature that helps the machine, when the user is connected to the internet, to find the fastest DNS server. It is built into the device and is designed to provide users with the highest speeds. Unfortunately, without understanding the privacy needs of the device user, automatically selects the fastest DNS server. A specific device, which overlooks the feature, is required to circumvent this function. Several VPN vendors provide plug-ins for these devices. However, an edit of the local community policy would be sufficient to deactivate the feature from the source.
4. Transparent DNS Proxies
ISPs often use transparent DNS proxies to push their own servers on their network users. It is achieved by intercepting and redirecting the web traffic from network users to another device operated by the ISP. Your information is exposed through this process. You need a VPN provider to block external DNS servers to counter transparent DNS proxies. The process can be supported in many VPN providers by simply editing the settings. You can select a specific provider who gives the choice if that is not provided by your service provider.
5. Teredo technology
Microsoft is using Teredo to overcome IPv6 and IPv4 compatibility issues. The different IP versions also result in DNS leakage, as mentioned earlier. However, Teredo will also ignore VPN settings and reveal your information when it is used over a VPN. By disabling the function, DNS leaks from Teredo can be corrected. You can do this via the command prompt. Teredo deactivation is a safe step and does not expose your data. However, when using a VPN, you should disable the function.
In addition, you must take action to ensure that leaks do not happen in the future, besides fixing DNS leaks. This can be done by selecting an independent server and using a firewall to make sure your VPN traffic passes all over. DNS checks can also be conducted periodically and program monitoring can also be introduced.